Understanding Cold and Thermometers

Doug discusses the concept of coldness using dry ice and explores the coldest place on Earth. He explains how thermometers work and how they help identify the South Pole as the coldest place due to its high elevation. The video concludes with a preview of questions for the next episode.

Why does Doug need to wear gloves when handling dry ice?

• To keep his hands warm

• To prevent frostbite

• To avoid getting wet

• To protect the dry ice

What happens when hot water is thrown into the air in Yellowknife?

• It forms ice cubes

• It remains as water

• It turns into snow

• It evaporates instantly

How do scientists measure the coldest places on Earth?

• By measuring wind speed

• By observing ice thickness

• By using thermometers

• By feeling the temperature

Why is it important to have numbers on a thermometer?

• To decorate the thermometer

• To measure temperature accurately

• To make it look scientific

• To compare with other thermometers

What did explorers use to determine the coldest place on Earth before thermometers?

• Ice thickness

• They couldn't determine it

• Wind speed measurements

• Their sense of touch

What is the zero degree mark on the Celsius scale based on?

• The temperature of dry ice

• The average temperature of Earth

• The freezing point of water

• The boiling point of water

What is the boiling point of water on the Celsius scale?

• 200 degrees

• 100 degrees

• 50 degrees

• 0 degrees

Which pole is colder, and why?

• North Pole, because it's on land

• South Pole, because it's at a higher elevation

• South Pole, because it's closer to the ocean

• North Pole, because it's closer to the sun

What is the record lowest temperature ever recorded at the South Pole?

• Minus 35 degrees Celsius

• Minus 40 degrees Celsius

• Minus 90 degrees Celsius

• Minus 60 degrees Celsius

What is the main reason the South Pole is colder than the North Pole?

• It is closer to the sun

• It is on a higher ice sheet

• It has more snow

• It is further from the equator